Why not?   It's not like yaourt is frowned upon.   It's an extremely useful utility.

On Thu, Feb 5, 2009 at 11:28 PM, Loui Chang <louipc.ist@gmail.com> wrote:
On Fri, Feb 06, 2009 at 09:12:15PM +0100, Gerhard Brauer wrote:
> Hello,
> as discussed we build a new set of ISOs/USB-Images with the state of a
> ReleaseCandidate.
> http://dev.archlinux.org/~aaron/archiso/
> Roadmap:
> http://bugs.archlinux.org/roadmap/proj6
> Bugs fixed in 2009.02-RC1:
> http://bugs.archlinux.org/task/12896
> http://bugs.archlinux.org/task/12949
> http://bugs.archlinux.org/task/13068
> http://bugs.archlinux.org/task/13070
> Please test them (esp. for the open bug-reports above). Test phase
> should go over this weekend, so that we probably could make the final
> release (sic!) during next week.

Hmm looks like the included beginner's guide needs updating.
I wouldn't recommend including a guide that recommends installing yaourt
in an official iso.